103results about How to "Reduce dropped calls" patented technology

The invention discloses a group switch method based on a mobility prediction. Multi-service group user ends which move along fixed routes in a major public transportation system need to apply to a target base station for group switch according to detected changes of a wireless channel. The method further provides a mobility prediction based on location information, which comprises the following steps: the process of reselecting a target cell is simplified by using a mobile historical database; and the target cell is enabled to obtain relative information of all group users in advance through a backup backbone network. Required channel resources are reallocated through strategies such as borrowing channels, etc. Therefore, the system switch speed of the group user terminal is greatly improved, and QoS of broadband wireless communications in the switch process is guaranteed. The method further discloses a group switch system based on the mobility prediction, which mainly comprises a location information unit, a switch judging unit, a channel borrowing and resource allocating unit and a channel allocating unit.

The embodiment of the invention discloses a method, a device and a system for controlling the power of a home Node B. The method for controlling the power of the home base station comprises the following steps of: determining that user equipment (UE) enters a micro-cell under the coverage of signals of the home Node B (HNB); determining that the UE does not have an authority to access to the HNB;acquiring a measurement report of the UE, wherein the measurement report comprises macro-cell signal quality information of the position of the UE; and determining that the signals of the micro-cell generate same frequency interferences to the signals of the macro-cell according to the macro-cell signal quality information, and reducing the transmitting power of the HNB. By applying the technicalscheme of the embodiment of the invention, when the unauthorized UE enters a coverage area of the micro-cell of the HNB, the transmitting power of the HNB is adjusted according to the signal quality of the macro-cell in which the UE is positioned so as to reduce the interferences caused by the HNB to the macro-cell and reduce drop-call phenomena of the unauthorized UE in the coverage area of the micro-cell of the HNB.

This invention discloses a method to realize control for user wireless resource for time-division synchronous CDMA multi carrier system, which comprises: a. arranging upper pilot frequency channel and quick physical access channel on auxiliary carrier wave of multi carrier system; b. the wireless network controller sends wireless resource control information with frequency information and upper synchronous information for said auxiliary carrier to user device; c. user device receives the information and executes synchronism. The invention can ensure all devices enjoying benefit from auxiliary carrier and decreases congestion hidden trouble for main carrier in early days.

The invention relates to a heterogeneous wireless network access selection method based on users. According to different service flow communication requirements of the users, network, terminal and user parameters are extracted, parameter key factors are quantized based on a fuzzy function, parameters are compared through an analytic hierarchy process, and the weights of the key factors are obtained; then according to an ordinal number preference algorithm similar to an ideal scheme, the close degree value of alternative network parameters is obtained by combining the parameter quantized value with the weights; network access is selected according to the close degree value. Network received signal intensity is sampled and pre-estimated, and calling drop caused by attenuation of received signal intensity of a selected access network is reduced. Through an improved fuzzy decision quantitative method, algorithm complexity caused by building of a fuzzy rule base is avoided, and calculation complexity is lowered. Optimal network access can be selected according to service types of the users, network congestion is reduced, and network resources are fully utilized.

The present invention discloses a method of generating adjacent district, the method is as follows: Load the digital map of planning district that need generate the list of adjacent district, then calculate the power of the receiving signal with the use of region geographic data and the data of base stations, and then generate the covering map of service district according to the power of the receiving signal; Generate the adjacent district list of each service district grid by grid, in the covering map of the service district; Determine the signal intensity and telephone traffic of each adjacent district in the switching band; Sort each adjacent district by the weighting value of the signal intensity and telephone traffic in the switching band, and then determine the priority of this service area in the list of adjacent districts; choose adjacent district for each service area, in accordance with the number of adjacent districts required by each service district. With the use of this invention, the relationship of adjacent area could be relatively accurate achieved in the network planning, so precise district would be chosen and network quality would be optimized.

A method for supporting a mobile terminal to move between base stations with different protocol versions comprises following steps: S102, one ore more sets of dialog configuration information are negotiated by a base station controller with the mobile terminal according to types of mobile terminal protocol versions; S104, in call process, according to types of mobile terminal protocol versions, the dialog configuration information which are used by the mobile terminal and the base station protocol version type of a call cell in the mobile terminal, the base station controller determines to whether or not establish connection with the mobile terminal or control whether or not the mobile terminal switch to another more adaptive dialog configuration information; S106, in handoff process, according to types of mobile terminal protocol versions, the dialog configuration information which are used by the mobile terminal and the pilot frequency intensity relation of the base station belonging to different protocol versions in routing updating messages reported by the mobile terminal, the base station controller determines to whether or not select a part of pilot frequency to switch or firstly control whether or not the mobile terminal switch to another more adaptive dialog configuration information.

The invention discloses a method for mobile terminal to realize channel switch, which includes the following steps: during the switch preparation stage, a source base station ensures a target node and a down node-set according to measurement information, and the down node-set begins to provide downstream transmission data for the mobile terminal during the switch preparation stage; during the switch stage, the mobile terminal switches the uplink into the target node, then the downstream data is still sent by down node-set; after the switch, the down node focus the node release resources except the target node, and the target node provides up-down service for mobile terminal. The invention also discloses a system and a base station for mobile terminal to realize channel switch, using the method, system and base station can reduce drop-calls and resource occupation of mobile terminal in switch process, and realize continuous receiving of downstream data in the whole switch process by mobile terminal, and improves transmission service quality of mobile terminal.

The embodiment of the invention discloses a method for intra-base-station cross-public-land-mobile-network (PLMN) switching. The method comprises: a base station obtains a PLMN negotiation result of a core network and a network sharing scene of the base station is determined based on the negotiation result, wherein the network sharing scene of the base station includes multi-operator core network (MOCN) sharing and gateway core network (GWCN) sharing; a measuring report sent by user equipment (UE) is received and a PLMN of a source cell and a PLMN of a switched target cell in the base station are determined based on the measuring result; and when the PLMN of the source cell and the PLMN of the switched target cell are different, intra-base-station cross-PLMN switching corresponding to the network sharing scene of the base station is executed. In addition, the embodiment of the invention also discloses a base station and a communication system.

The invention relates to a disturbance restrain method of time-slot code division multiple access system. Wherein, it comprises when the detected code channel is more than maximum code channel of receiver, the system changes the signal channel coding speed of user or the speed matching hole rate, reduces sent data, and changes modulation, to control the detected code channel under maximum code channel. The invention can reduce the drop communication rate of TD-SCDMA system at the region edge, to improve the system stability.

The invention discloses a method relating to the relocation of SRNS for realizing the integrity protection of RRC signaling. TRNC sends message to UE by adopting the serial number which is added with bias and the corresponding superframe number. To be more specific, the SRNC adds bias to the stored serial number and modifies the superframe number; the serial number and the superframe number are sent to the TRNC which sends message to a user terminal by the received serial number and the superframe number; or the SRNC sends the reserved serial number and the superframe number to the TRNC which adds bias to the serial number and modifies the superframe number; messages are sent to a user terminal by the serial number and the superframe number. The invention also discloses a system relating to the relocation of the SRNS for realizing the integrity protection of RRC signaling and a radio network controller. The invention can realize the sameness of the user terminal as the serial number and the superframe number of the TRNC, thereby ensuring the realization of the integrity protection in the process of the relocation of the SRNS, more particularly, the situation that the SRNC excessively sends information in the process of relocation, and further reducing words dropping.

The invention discloses neighboring relationship configuration implementation method, system and device. The method comprises the following steps: after confirming that a mobile terminal is accessed to a current serving cell, a base station sends a neighboring measurement task to the mobile terminal; the base station analyzes a carried physical cell identity (PCI) of a newly found neighboring cell after receiving the measurement report reported by the mobile terminal; the base station issues a cell global identifier (CGI) measurement task to the mobile terminal and receives the PCI-CGI information reported by the mobile terminal, wherein the CGI measurement task carries the PCI of the newly found neighboring cell; according to the PIC-CGI information, the base station acquires the configuration information of the newly found neighboring cell when confirming that the newly found neighboring cell is not in a neighboring cell list; and the base station reports the configuration information of the newly found neighboring cell to a neighboring cell configuration control device, and receives the configuration result returned by the neighboring cell configuration control device. According to the neighboring relationship configuration implementation method, the neighboring cells of the current serving cell can be automatically found and added in the neighboring cell list, the switching success rate can be improved, and the call drop can be reduced.

The invention discloses a method and a system which can realize zoning coverage through mirror image RRU. The system comprises a plurality of cascaded RRUs and BBUs connected onto the RRUs, and the cascaded RRU comprises a main RRU and a mirror image RRU. In the cascaded RRUs, each RRU transforms analog signal received by at least an antenna from the corresponding covering region into digital signal, therein, the mirror image RRU overlaps the digital signal transmitted from the RRU of the previous cascade and the digital signal gathered in the locality and transfers to the next cascade, the transfer is performed stage by stage until one mirror image RRU transfers the overlapped digital signal into the signal channel of the BBU to perform the baseband processing. The adoption of the invention maintains the coverage radius of each RRU, the coverage capacity in the cell can be expanded under the unlimited capacity, and simultaneously the demand to the BBU processing capacity is reduced.

The invention discloses a detemining method of triggering different- system network switching, comprising the steps of: A) multimode terminal measures pilot strength of the current cell in the current network and determining whether the measured pilot strength is lower than switching removal threshold T_DROP: if yes, returning to the step A; otherwise deleting the current cell from an activation set and executing step B; B) the multimode terminal determines whether the activation set and a candidate set are empty: if yes, executing step C; if both of them are not empty, returning to the step A; C) triggering different-system network switching. And it can accurately determine whether the terminal is on the network edge: if yes, it can in time trigger different-system switching.

The invention discloses a method and a system for realizing connection reestablish of a radio resource control (RRC) protocol. The method includes steps of sending radio link failure indication to a source eNode B attributive to the UE (user equipment) through an X2 interface after the source eNode B receives an RRC connection reestablish request sent by the UE, and carrying identification information capable of implementing the RRC connection reestablish by switching. The source eNode B is informed that RRC connection reestablish can be realized by switching after receiving the wireless connection failure indication, then sends switching request to a target eNode B and carries context information of the UE, the RRC connection reestablish of the UE is started after the target eNode B receives the switching request. Supporting range and scene of the current protocol to the RRC connection reestablish are broadened, and dropped calls caused by failure of the radio link failure in the network can be effectively reduced.

The invention provides a processing method for a terminal neighbouring zone list and a base station controller. The processing method for the terminal neighbouring zone list comprises the following steps: the base station controller (BSC) ranks the priorities of terminal neighbouring zones according to the stored historical switchover information of a terminal or the neighbouring zone information of a community; and the BSC selects the terminal neighbouring zones sequentially according to the priorities from high to low so as to generate the terminal neighbouring zone list. According to the processing method for the terminal neighbouring zone list and the base station controller, more reasonable information on neighbouring zone list for the terminal can be provided, thereby improving the rate of success of switchover, and call drop of the system is reduced.

The invention provides a method for determining the transmitting power of special bursting sub frames, which is applied to the discontinuous transmitting process of downlinks and includes the following steps: determining the transmitting power of reference special bursting second sub frames; determining the increase value of path loss of the current special bursting sub frames comparatively to the reference special bursting second sub frames; determining the sum of the transmitting power of the reference special bursting second sub frames and the increase value of the path loss as the transmitting power of the current special bursting sub frames; the reference special bursting sub frame is a first special bursting second sub frame in the discontinuous transmitting process of the downlinks or the previous special bursting second sub frame in current special bursting transmitted or the special bursting second sub frame currently transmitted in the special bursting period with preset numbers apart before the special bursting sub frames. The invention provides a device which determines the transmitting power of the special bursting sub frames. By adopting the invention, the transmitting power of the current special bursting sub frames can be more accurate so as to improve the call quality in the downlink DTX process and reduce the call drop.

The application discloses a radio resource control (RRC) connection and reestablishment method. After a RRC connection and reestablishment request is received by a base station, if UE context information cannot be found locally, then in a cell which is reported to be reestablished, the physical cell identity (PCI) carried by the user equipment identity is analyzed, and the cell which triggers the reestablishment is found by matching PCI in a neighboring cell list and the user equipment context information is acquired from the base station of the cell, thereby initiating the RRC connection and reestablishment of the user equipment. According to application, RRC connection and reestablishment can also be realized when existing protocols do not support the operation, so that the RRC connection and reestablishment success rate can be improved, and the UE call drop rate can be reduced.

The invention discloses a mobile relay and a system and an adjacent region self-optimizing method thereof and belongs to the field of wireless communication. The method comprises the following steps: when the mobile relay finds that the speed of the train with the mobile relay is lower than a preset first threshold and receives the fact that a donor base station indicates that the coverage area of the donor base station can configure a dynamic adjacent region relationship in a broadcast message, an adjacent region relationship adding process is started; the mobile relay obtains the 2G or 3G adjacent region information of the donor base station through the broadcast message of the donor base station, and effective 2G or 3G adjacent regions are added into a self dynamic adjacent region list; the mobile relay establishes an adjacent region relationship with the 2G or 3G adjacent regions in the dynamic adjacent region list. Through self-sensing, self-measuring and information interaction between nodes, the mobile relay can automatically add the adjacent region relationship of LTE / 3G / 2G regions in a macro base station when the train pulls into a station and pulls out of the station. The whole process does not need artificial participation, and the operation and maintenance cost is reduced.

The invention discloses a method for controlling a downlink transmission power, a minimum receiving code power level Qrxpwrmin and a signal-inference ratio target value SIRtarget are set in an user equipment UE and a minor minimum downlink transmission power Minimum DL Power is set in the base station, if the SIR measuring value SIRmeas measured by the UE is larger than the SIRtarget and the code power level Qrxpwr received by the UE is larger than the Qrxprmin, so that the base station is indicated to reduce the downlink transmission power, the base station can judge the present transmission Current DL Power and the Minimum DL Power based on the indication and correspondingly reduces or maintains downlink based on the judging results, because the set Minimum DL Power value is smaller, thereby saving the system power resource; if the SIRmeas measured by the UE is smaller than the SIRtarget or the Qrxpwr received by the UE is smaller than the Qrxpwrmin, the base station is indicated to improve the downlink transmission power, thus when the UE is positioned on a district edge, the Qrxpwr received by the UE can be ensured, the Dropped Call Rate can be reduced when the UE is positioned in a declined or a depth declined area. The invention also discloses a system for controlling downlink transmission power.

The invention discloses a circuit switched (CS) domain based system and method for transmitting GSM-R (Global System for Mobile Communication-Railway) train control data in real time. The system comprises a distributed antenna array, a network-side BTS (Base Transceiver System) and a train locomotive terminal; wherein the distributed antenna array is erected along the railway and used for providing signals of the same fixed frequency for the train locomotive terminal so as to ensure that a CS domain data transmission link of the train locomotive terminal is always in a connection state; the network side BTS is connected with distributed antennae in a wired manner and used for controlling the on / off states of the antennae so as to realize a network side switch function; and the train locomotive terminal is connected with the network side BTS through a wireless transmission link. The invention changes the traditional GSM-R handover strategy to ensure that a train always runs in a cell with a fixed frequency; and a handover function is controlled by one network side BTS so that a ping-pong handover phenomenon is eliminated and the communication stability and the safety reliability ofthe train are obviously enhanced.

The invention discloses an automatic optimization method for the neighbor relation of an LTE network, and the method comprises the steps: obtaining related information, correlated with neighbor optimization, of a cell; determining a necessary GSM adjacent cell list, a necessary TD adjacent cell list and a necessary LTE adjacent cell list of the LTE cell; enabling the determined necessary GSM adjacent cell list, necessary TD adjacent cell list and necessary LTE adjacent cell list of the LTE cell to be respectively compared with a GSM adjacent cell relation list, a TD adjacent cell relation list and an LTE adjacent cell relation list of the LTE cell in a present network; screening out the leaked GSM adjacent cells, adjacent TD cells and LTE adjacent cells; and enabling the leaked GSM adjacent cells, adjacent TD cells and LTE adjacent cells to be respectively added to the adjacent relation list of the LTE cell in the preset network. Compared with a preset optimization mode, the method saves a large amount of manpower and material resources, achieves the automatic optimization of the adjacent cells of the LTE cell, and greatly improves the optimization efficiency of the adjacent cell.

When a cellular wireless communication device can receive communication from multiple (more than one) transmission sources, two steps are performed. First, a block of source data made up of M packets is coded (encoded) such that the block of source data can be derived at the receiver from any K (K=M+A) out of the N packets, where A<M, M<N and N is the total number of coded packets. Second, different subsets of the N packets are sent from each of the transmission sources. The cellular wireless communication device can receive packets from multiple transmission sources. For example, the block of source data can be coded by Reed-Solomon (RS) coding or rateless coding such as Tornado coding or Raptor coding. (Sometimes they are also called Fountain Codes). An example of the multiple sources is multiple base stations in a cellular communication system. Other examples of the multiple sources include multiple sectors, multiple RF channels (multiple frequencies), multiple beams (using a smart antenna system) multiple sets of tones (in an orthogonal frequency division multiplexing based system), and multi-code channel communication systems. Possible applications include W-CDMA, Wi-Max, etc. In real-time applications, such as, for example, voice communications, the real-time requirement may be satisfied in many cases in which the real-time requirements would otherwise fail. For example, in voice over internet protocol (VoIP) communications, a voice call may be clearer, or may avoid being dropped. In another example, better streaming video can be achieved.

The invention discloses a single-channel voice call continuity (SRVCC) switching management method and apparatus. The method comprises the steps of determining that a QCI1 of a terminal (UE) is established successfully, starting a first timer, and triggering detection of a received session initiation protocol (SIP) signaling; prohibiting execution of SRVCC switching of the UE when it is determinedthat the first timer is not overtime, the first SIP signaling is not detected before the first timer is overtime, wherein the first SIP signaling indicates that SRVCC switching is allowed; and allowing the execution of the SRVCC switching of the UE, for example, sending a radio resource control (RRC) connection reconfiguration signaling to the terminal, when it is determined that the first timeris overtime, and the first SIP signaling is not detected before the first timer is overtime, or determining that the first timer is not overtime, and the first SIP signaling is detected before the first timer is overtime.

The invention discloses a method and a device for reducing interference, which belong to the technical field of radio communication. The method comprises the following steps of: calculating isolation between the current user and users on a usable time slot and a usable frequency point according to the signal-to-interference ratio of the current user and the signal-to-interference ratios of the users on the usable time slot and the usable frequency point, wherein the isolation is inversely proportional to the interference; according to all the calculated isolation, determining a time slot and a frequency point corresponding to the isolation which is higher than a preset threshold value, and taking the time slot and the frequency point as resources to be allocated; and transmitting information of the resources to be allocated to a radio network controller to ensure that the radio network controller allocates the resources to be allocated to the current user. The device comprises a calculation module, a determination module and a transmitting module. By the method and the device, the interference between the current user and other users is reduced, and the phenomena of call dropping caused by the interference in the process of user access or switching can be reduced.

The invention discloses a method for updating switching parameters in the process of soft switching of a terminal among access networks, which comprises the following steps: the access terminal notifies a source access network of a target cell in a target access network required to be switched to; and the source access network acquires the switching parameters of the target cell from the target access network, and updates the switching parameters of the access terminal according to the acquired switching parameters of the target cell. The method of the invention avoids the problems of dropped call, low network performance, switching failure and the like caused by that the switching parameters do not meet the actual wireless conditions when the terminal is in a switching area, increases the success rate of the soft switching of the access terminal, reduces the conditions of dropped call, and enhances the user experience.

The invention discloses an optical line terminal and an optical link switching method and relates to the technology of a mobile communication passive optical network. The method provided by the invention comprises the steps that a first passive optical network PON port of the optical line terminal OLT obtains distance measurement information of optical network units ONUs in a backup optical link and stores the obtained distance measurement information of the ONUs in the backup optical link; and when an optical link is switched, a second PON port of the OLT broadcasts switching commands to theONUs in the original backup optical link and carries out distance remeasurement on the ONUs which do not store the distance measurement information, in the original backup optical link. The inventionalso discloses the optical line terminal. According to the technical scheme provided by the invention, in a scene that partial ONUs obtain the distance measurement information of the backup link, thebusiness switching stability of all ONUs can be effectively improved, and phenomena that the ONUs are offline in a switching process can be reduced. For the ONUs obtaining the distance measurement information, the business recovery time can be effectively reduced.

The present invention discloses service data card service user terminal accessing method, relating to third generation mobile communication technology, providing high-speed data transmission providing high-speed data transmission for data cards without compression mode measuring and pilot frequency switching in using HSDPA. The present invention makes each cell according to whether supporting data cards service setting sign, and broadcasting said sign in broadcast channel, to make UE capable of according to said sign selecting resident only in supporting data cards service cell. Data cards service supporting cell can be HSDPA supporting cell and not supporting HSDPA common cell outside supporting HSDPA cell coverage area. Said sign can be configured accessing grade correlative parameter.

The invention provides a load balancing method and device. The method comprises the steps of acquiring a user set meeting a switching condition of switching from a first cell to a second cell, whereinthe first cell and the second cell are completely identical covered cells; when users in the first cell move to a cell edge, determining switching users; determining whether the switching users matchwith the user set; and if yes, switching the switching users to a fourth cell, wherein the fourth cell is a neighboring cell of the same frequency of the second cell. The existing load balancing method has problems of frequent switching, high switching failure rate, and low user experience. The method solves the problems in the prior art.

The embodiment of the invention discloses a handover method for a target cell. The method comprises steps of when a user terminal (UE) enables carrier aggregation, determining whether it is detected that a current cell quits the service or whether a measurement report indicative of a decrease in the primary carrier signal quality of the current cell sent by the UE is acquired; if so, determining atarget cell according to the secondary carrier information by using a preset determining rule or a preset weight rule; and sending an execution message for handing over to the target cell to the UE.The embodiment of the invention also discloses a base station for handover of the target cell and a user terminal.

The embodiment of the invention discloses a channel quality information reporting method and a mobile terminal, wherein the method can comprise the following steps: recording accessed channels when the mobile terminal is offline at each time in a current period; detecting the actual signal strength of various accessed channels of the mobile terminal in the current period; and reporting the reference signal strength of various accessed channels of the mobile terminal, wherein the reference signal strength is equal to the actual signal strength deducted by the preset adjustment amount of corresponding channels; and the more the offline time of the channels when the mobile terminal is accessed, the higher the preset adjustment amount is. By means of the embodiment of the invention, the mobile terminal can adjust channel quality information reported to a base station according to the actual signal strength of various accessed channels and the offline time adaptability of the various; therefore, the base station reasonably distributes channels to the mobile terminal, such that the offline rate of the mobile terminal is reduced; and thus, the communication quality of the mobile terminal is improved.